Aarhus Case Study (CS) is located in Denmark. The climate is continental with a daily temperature mean range between -1 - 21 ºC. The monthly rainfall mean range is between  28 and 56 mm. The urban catchment is about 91 km2. The city gathers 282,900 people with a population density: of 2,874 people/km2. The water bodies influenced are: Aarhus river basin, lakes of Arslev, Egä and Brabrand, bay of Aarhus.  Figure 7 show examples of GI to be validated and optimised in Aarhus CS.

Aarhus CS aims to address diffuse pollution monitoring and model dry (left photo) and wet (right photo) ponds as GIat urban catchment level of the city.

CS Aarhys phaot dry GI 1
 Dry pond as GI

Waterun CS Aarhus photo wet GI 2
Wet pond as GI

In addition, Aarhus CS will deal with the operation and optimisation of UWR treatment by 4 NBS (2 wet ponds and 2 dry ponds) already implemented in the city centre of Aarhus but with a poor removal efficiency for diffuse contaminants from UWR.

Over the course of the project, Aarhus CS will demonstrate innovative modelling studies and tools to facilitate the UWR management in cities with continental climate conditions and residential land use and validation of implemented GI to treat efficiently pollutants from UWR.


The related Key Performance Indicators are:

  • 70% removal efficiency of PAH, microplastics and phosphorus will be obtained in 4 NBS (2 wet ponds and 2 dry ponds)
  • 1 Local Stakeholder Board (LSB)
  • Identification tool validated at urban catchment level in Aarhus
  • Planning tool validated in 2 districts


WATERUN key activities involving Aarhus CS are listed in the following table:

WATERUN CS Aarhus activities

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